Whoops: The post was way too long initially, and "The assumption" referenced a statement that I subsequently deleted when I tried to trim it down. It went some

Whoops: The post was way too long initially, and "The assumption" referenced a statement that I subsequently deleted when I tried to trim it down. It went something like "assuming that online purchases are evenly distributed across the population", and wasn't intended to be correct - Just a first-order approximation.